galyin



(No Model.)

J. W. GALVIN.

REGENERATI'VE FURNACE.

Patented May 6, 1884.

WTNEE5E5= NITED STATES Parnnr tries.

JOHN IV. GALVIN, OF PORTSMOUTH, OHIO, ASSIGNOR OF ONE-HALF TO LEVI D. YORK, OF SAME PLACE.

REGENERATIVE FURNACE.

SPECIFICATION forming part of Letters Patent No. 298,297, dated IMay 6, 1884.

(No model.)

' holes, arranged as nearly tangential as may be to the curves of the flues, and I provide these holes with close-fitting plugs, which are kept for the most part of the time in position, to close the apertures entirely, but capable of being readily removed, so as to expose a small aperture, extending in or near the general direction of the currents of the hot gases in the space which is to be cleared of soot. These holes are opened at intervals, and I introduce strong blasts of gaseous matter through them. I do this in some cases by discharging in each a musket or apparatus charged with gunpowder or other explosive material. Under some circumstances I can employ, instead of the blasts due to such explosions, strong blasts of air or steam directed into the several holes in succession. The violent movement of the gaseous matter thus injected through the several holes detaches and sweeps out the soot, and keeps the fiues comparatively clean,whatever may be the character of the fuel employed. It will be understood that the direction in which these blasts are discharged corresponds with or, at worst, does not oppose that in which the hot products of combustion in the flue are moving. The draft of the furnace is in no way obstructed, but rather increased, by the operation. By removing the plugs and introducing the blasts into the several holes only one, or asmallnumber, at a time, the operation of the furnace maybe continued without interruption or appreciable disturbance. In some metallurgical operations considerable quantities of metal, in the form of an oxide or in other forms, are carried by the draft into the dues, and condenses or otherwise lodges there, so as to adhere or stick to the surfaces with considerable force. The strong blasts of gaseous matter or steam injected by my invention dislodge such accumulations of metallic matter, as also ashes, soot, and all forms of coating and clogging material.

The accompanying drawings form a part of this specification, and represent what I consider the best means of carrying out the invention.

Figure 1 is a vertical sect-ion of a gas-furnace of the class in which the hot products of combustion are conducted from the furnace in a series of parallel fiues nearly or quite around the furnace, and the fresh air is taken in through a series of fines sandwiched between them. In this form of furnace the heat is transmitted from the hot gases in one set of dues to the air in the other set of fines by being conducted in the obvious manner through the partition walls of fire-brick or analogous material. This figure also shows the gas-producer in section. Fig. 2 is a vertical section at right angles to Fig. 1.

Similar letters of reference indicate corresponding parts in both the figures.

I designates the gas-producing furnace, connected to the regenerator-furnace by passage 1'.

A is the hearth andB the dome of a regenerative furnace of one of the approved types. The construction affords four fresh-air flues, c, sandwiched between five flues, d, which conduct away the gaseous products of combustion. A portion of the heat of the latter is communicated through the thin walls of fire-brick or analogous material which separate these lines, so that the fresh air enters the furnace at a high temperature, thus contributing to the heat available in the furnace for melting, reducing, or otherwise treating the metal on the hearth. The outer walls, BB, are brought into close contact with each other, are of substantial fire-brick, and formed as shown, to allow of their being traversed by a seriesof small holes, I), which holes are arranged nearly in line with the fines, or, in other words, tangentially to the curves in the several portions of the smoke-fines d, with which they communicate.

When a discharge of gunpowder or a like material is relied on for a violent injection of gas through the several orifices b, provision may be made by a series of muskets or analogous devices, loaded at a distant point, provided for the convenience and safety of the operators. The strong blasts through the" several holes I) clean the interior of those portions of the flue which are directly exposed thereto. The holes I) should be sufficient in number, and so distributed as to clean the whole interior of all the smoke-fines. It will be readily seen that my invention not only avoids the necessity for an entire stopping of the operation of the furnace to clean the fines, but also by keeping the inner dome always thoroughly clean, the furnace can be brought to a higher temperature and the amount of fuel consumed may be materially lessened by reason of the increased freedom of transfer of the heat from the fines d to the flues c. The number of the heats between repairs will be much greater by reason of my invention.

The invention can be applied to furnaces already constructed and working by simply introducing suitable bricks, B, at intervals,

20 having the holes b and the proper construction for their convenient plugging.

I am aware that it is not new with me to construct a furnace in such a manner that blasts of air or steam may be injected into the fines for a similar purpose, and such construction is not sought to be broadly covered in this application.

I claim as my invention- The regenerative furnace herein described, having the grate A, domes B B, and double walls to form passages (1, arranged alternately with cold-air passages c, the tangential holes or fiues Z), leading through the outer wall into the passages d, and covers F for closing said flues, all constructed, arranged, and adapted to serve as and for the purposes set forth.

In testimony whereof I have hereunto set my hand, at Portsmouth, Ohio, this 6th day of September, 1882, in the presence of two subscribing witnesses.

JOHN XV. GALVIN.

YVitn esses:

WV. B. GRIcE, LEVI D. YORK. 

